Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
권호 표지
DOI QR코드

DOI QR Code

Investigation of Galling In Forming Galvanized Steel Sheet

  • Altan, Taylan (Engineering Research Center for Net Shape Manufacturing (ERC/NSM) The Ohio State University) ;
  • Kardes, Nimet (Engineering Research Center for Net Shape Manufacturing (ERC/NSM) The Ohio State University) ;
  • Kim, Hyunok (Edison Welding Institute (EWI))
  • Received : 2009.10.15
  • Accepted : 2011.02.25
  • Published : 2011.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

The major purpose of the present study is to evaluate the performance of various galvanized (GI) or galvannealed (GA) mild steels and AHSS in stamping applications. Finite Element Analysis (FEA) of selected stamping operations was conducted to estimate the critical pressure boundary conditions that exist in practice. Using this information, laboratory tribotests, e.g. Twist Compression (TCT), Deep Drawing (DDT) and Strip Drawing (SDT) Tests, were developed to evaluate the performance of selected lubricants and die materials/coatings in forming galvanized steels of interest. The sheet materials investigated included mild steels and AHSS (e.g. DP600 GI/GA, DP780 GI/GA, TRIP780 GA and DP980 GI/GA). Experimental results showed that galvanized material resulted in more galling, while galvannealed material showed more powdering and flaking. The surface roughness and chemical composition of galvanized sheet materials affected the severity of galling under the same testing conditions, i.e. lubricants and die materials/coatings. The results of this study helped to determine the critical interface pressure that initiates lubricant failure and galling in stamping selected galvanized sheet materials. Thus, to prevent or postpone the critical interface conditions, the results of this study can be used to select the optimum combination of galvanized sheet, die material, die coating and lubricant for forming structural automotive components.

Keywords

References

  1. N. Asnafi, K. Kjellsson, and T. Johansson, International conference on recent developments in manufacture and use of tools and dies and stamping of steel sheets, p. 263 (2004).
  2. M. Liljengren, K. Kjellsson, N. Asnafi, and T. Johansson, Proceedings of IDDRG, p. 597 (2006).
  3. P.J. Blau and K.G. Budinski, Wear, 225, 1159 (1999).
  4. P. Carlsson, U. Bexell, and M. Olsson, Wear, 247, 88 (2001). https://doi.org/10.1016/S0043-1648(00)00521-4
  5. E. Van der Heide, and D.J. Schipper, Wear, 254, 1127 (2003). https://doi.org/10.1016/S0043-1648(03)00324-7
  6. J. L. Andreasen, N. Bay, and L. De. Chiffre, International Journal of Machine Tools & Manufacture, 38, 503 (1998). https://doi.org/10.1016/S0890-6955(97)00095-3
  7. D.D. Olsson, N. Bay, and J.L. Andreasen, Annals of CIRP, 53/1, 231 (2004). https://doi.org/10.1016/S0007-8506(07)60686-6
  8. C.M. Wichern, and C.J. Van Tyne, J. Mater. Eng. Perform., 8, 571 (1999). https://doi.org/10.1007/s11665-999-0011-9
  9. M. Vermeulen, and J. Scheers, International Journal of Machine Tools and Manufacture, 41, 1941 (2001). https://doi.org/10.1016/S0890-6955(01)00059-1
  10. H. Kim, Q. Yan, and T. Altan, J. Mater. Process. Technol., 209, 4122 (2009). https://doi.org/10.1016/j.jmatprotec.2008.10.007
  11. H. Kim, S. Han, Q. Yan, and T. Altan, Annals of CIRP, p. 299 (2008).
  12. G. Gutscher, H. Wu, G. Ngaile, and T. Altan, J. Mater. Process. Technol., 146, 1 (2004). https://doi.org/10.1016/S0924-0136(03)00838-0
  13. S. Chandrasekharan, H. Palaniswamy, N. Jain, and T. Altan, International Journal of Machine Tools and Manufacture, 45, 379 (2005). https://doi.org/10.1016/j.ijmachtools.2004.09.014

Cited by

  1. Enhanced lubricity of zinc phosphate coating by stearic acid vol.30, pp.6, 2011, https://doi.org/10.1002/ls.1424